Letter: X
- xen-3.0.3-94.el5_4.3: Xen is a virtual machine monitor
- xen-devel-3.0.3-94.el5_4.3: Development libraries for Xen tools
- xen-libs-3.0.3-94.el5_4.3: Libraries for Xen tools
- xorg-x11-server-Xdmx-1.1.1-48.67.el5_4.1: Distributed Multihead X Server and utilities
- xorg-x11-server-Xephyr-1.1.1-48.67.el5_4.1: A nested server.
- xorg-x11-server-Xnest-1.1.1-48.67.el5_4.1: A nested server.
- xorg-x11-server-Xorg-1.1.1-48.67.el5_4.1: Xorg X server
- xorg-x11-server-Xvfb-1.1.1-48.67.el5_4.1: A X Windows System virtual framebuffer X server.
- xorg-x11-server-Xvnc-source-1.1.1-48.67.el5_4.1: Xserver source code required to build VNC server (Xvnc)
- xorg-x11-server-sdk-1.1.1-48.67.el5_4.1: SDK for X server driver module development
- xorg-x11-xdm-1.0.5-7.el5: X.Org X11 xdm - X Display Manager
- xterm-215-8.el5_4.1: xterm terminal emulator for the X Window System